A week after the US Department of Agriculture had to temporarily close six offices in five states due to threats, a shed at one of their GMO focused complexes in Maryland was gutted in a mysterious blaze.

Rescue Engine 49 on scene for a fire in the USDA building in Beltsville. Photos from news helicopter footage. pic.twitter.com/yCYCHQgxpc

The Beltsville facility — which focuses on poultry diseases, as well as controversial genetic modification of vegetables, animals, and insects — was one of recipients of the anonymous threats last Tuesday.

“Yesterday, USDA received several anonymous messages that are concerning for the safety of USDA personnel and its facilities. As a precaution, USDA has closed offices,” department spokesman Matthew Herrick said in a statement last week.

Facilities who received the emailed threats also included Fort Collins, Colorado; Hamden, Connecticut; Raleigh, North Carolina; and Kearneysville and Leetown, West Virginia.

“It’s a threat to do harm to people at the facility until the police arrive. They were going to break into the building,” West Virginia’s Jefferson County Sheriff Pete Dougherty told Reuters at the time.

The incident took place at the Beltsville facility in Prince George’s County in a storage shed that reportedly contained posters. Nobody was injured in the fire, which was extinguished within two hours of the first reports.

The USDA has not commented on whether or not anything was stolen in the potential arson, and the fire department and the Federal Bureau of Alcohol, Tobacco, Firearms and Explosives are working together while investigating the fire. They have not yet confirmed if it was related to the cyber threats.

So far, no animal or environmental rights groups have claimed responsibility for the fire.